Radiator, air cooling equipment and radiator manufacturing method

Abstract

The invention discloses a radiator, air cooling equipment and a radiator manufacturing method, and is applied to the field of radiator noise reduction, the radiator comprises a radiator body, the radiator body comprises a radiator main body and a plurality of radiator fins arranged on the radiator main body, and the thickness direction of the radiator fins is perpendicular to the airflow direction of a radiating channel in the air cooling equipment; the porous noise reduction component is used for absorbing aerodynamic noise, and the porous noise reduction component is installed on the side wall, in the thickness direction, of the radiator fin and extends in the airflow direction. According to the radiator provided by the invention, the porous noise reduction part is arranged, the porous medium material is utilized, the sound absorption and noise reduction area is formed on the surface of the radiator fin, the noise reduction purpose can be achieved, meanwhile, the influence on airflow in the heat dissipation channel can be reduced by limiting the extending direction of the porous noise reduction part, and the heat dissipation efficiency is improved. Therefore, the influence on the radiating effect of the radiator body is reduced.

Description

Technical Field

[0001] The present invention relates to the field of radiator noise reduction, and in particular to a radiator, an air cooling device and a radiator manufacturing method. Background Art

[0002] As the energy consumption and performance of electronic equipment continue to increase, higher and higher requirements are placed on heat dissipation performance, which is accompanied by a continuous increase in system fan speed and deterioration of noise. As a key component in air-cooled equipment, the radiator generates high-speed airflow through the radiator, resulting in unstable flow of local airflow around the radiator, which makes the aerodynamic noise of the air-cooled equipment large. Therefore, the optimization and control of aerodynamic noise based on the radiator itself has great prospects and significance.

[0003] In the related art, a noise reduction unit is provided on the radiator, and a sound wave channel is provided in the noise reduction unit. The cross-sectional area of ​​the sound wave channel changes from the inlet to the outlet. The sound wave enters the adjacent sound wave channel from the inlet and propagates, and generates a phase difference at the outlet to cause interference, thereby reducing the transmission of the sound wave and achieving noise reduction. However, although this method can solve the noise reduction problem of the equipment, the flow resistance is large and it cannot be adapted to equipment with high power consumption and high heat flux density. Alternatively, the related art also adopts a method of providing noise reduction foam in the air-cooled equipment. However, this method will affect the heat dissipation and have an impact on the function of the radiator.

[0004] Therefore, how to effectively improve the noise reduction effect of the radiator is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a radiator, an air cooling device and a radiator manufacturing method, which are used to reduce noise while ensuring the heat dissipation effect of the radiator.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A radiator, comprising:

[0008] The radiator body comprises a radiator body and a plurality of radiator fins arranged on the radiator body, wherein the thickness direction of the radiator fins is perpendicular to the air flow direction of the heat dissipation channel in the air-cooling device;

[0009] The porous noise reduction component is used for absorbing aerodynamic noise. The porous noise reduction component is installed on the side wall of the radiator fin along the thickness direction and extends along the airflow direction.

[0010] On the other hand, the thickness d of the porous noise reduction component along the thickness direction of the radiator fin is 0.2λ 预设1 ~0.3λ预设1 ,λ 预设1 The wavelength at the first preset absorption noise frequency.

[0011] On the other hand, a mounting groove is provided on the side wall of the radiator fin, the porous noise reduction component is fixed in the mounting groove, and an air gap is provided between the porous noise reduction component and the bottom of the mounting groove.

[0012] On the other hand, a side surface of the porous noise reduction component facing away from the radiator fin is flush with the notch surface of the mounting slot, or a side surface of the radiator fin protrudes from the notch surface of the mounting slot.

[0013] On the other hand, the thickness d of the air gap along the thickness direction of the heat sink fin is 间隙 0.15λ 预设2 ~0.35λ 预设2 ,λ 预设2 is the wavelength at the second preset absorption noise frequency.

[0014] On the other hand, the porous noise reduction component is in strip shape, and there are multiple porous noise reduction components, which are arranged at intervals from one side of the radiator fin close to the radiator body to the other side, and each of the porous noise reduction components is arranged in parallel.

[0015] On the other hand, a side surface of the porous noise reduction component facing away from the radiator fin protrudes beyond the side wall surface of the porous noise reduction component to increase the effective heat dissipation area of ​​the radiator fin.

[0016] On the other hand, the porous noise reduction component is provided with a tip or a serration on the side away from the radiator fin, the tip extends in a direction away from the radiator fin, and the serration extends from one side close to the radiator body to the other side on the porous noise reduction component.

[0017] On the other hand, a plurality of noise reduction holes are provided on the side wall of the radiator fin, the noise reduction holes are arranged at intervals, and the noise reduction holes are arranged through the radiator fin in the thickness direction.

[0018] On the other hand, the sum of the cross-sectional areas of the noise reduction perforations on the same side wall of the radiator fin is 1% to 3% of the surface area of ​​the side wall on the radiator fin.

[0019] On the other hand, the cross-section of the noise reduction perforations is circular or waist-shaped, the noise reduction perforations have several rows, and the number of the noise reduction perforations in each row is multiple, the arrangement direction of the noise reduction perforations in each row is parallel to the extension direction of the porous noise reduction component, and each row of the noise reduction perforations and the porous noise reduction component are alternately arranged on the radiator fin from one side close to the radiator body to the other side.

[0020] An air cooling device comprises the above-mentioned radiator.

[0021] A heat sink manufacturing method adopts a heat sink manufacturing tool, wherein the heat sink manufacturing tool comprises a first bearing fixture and a second bearing fixture, wherein the first bearing fixture and the second bearing fixture each comprise a bottom plate and a plurality of bearing plates, wherein the bearing plates are provided with a limiting groove for placing the porous noise reduction component; the heat sink manufacturing method comprises:

[0022] Step S1: arranging the porous noise reduction component and the welding material on the first carrying fixture and the second carrying fixture;

[0023] Step S2: Assembling the first carrying fixture, the second carrying fixture and the radiator body, and making the bottom plate of the first carrying fixture located at the first end of the radiator fin along the airflow direction, each carrying plate of the first carrying fixture located at the first side of the radiator fin along the thickness direction, the bottom plate of the second carrying fixture located at the second end of the radiator fin along the airflow direction, and each carrying plate of the second carrying fixture located at the second side of the radiator fin along the thickness direction;

[0024] Step S3: heating the first bearing fixture, the second bearing fixture and the radiator body until the welding material is melted, the welding material fixes the porous noise reduction component on the radiator body, and cooling the first bearing fixture, the second bearing fixture and the radiator body;

[0025] Step S4: separating the first carrying fixture, the second carrying fixture and the heat sink body along the airflow direction to obtain the heat sink having the porous noise reduction component.

[0026] On the other hand, the step S3 further comprises:

[0027] Step S31: preheating the first carrying fixture, the second carrying fixture and the heat sink body;

[0028] Step S32: When the preheating temperature reaches the melting point of the welding material, the first load fixture, the second load fixture and the heat sink body are kept warm;

[0029] Step S33: Continue heating the first carrier fixture, the second carrier fixture and the heat sink body to a peak temperature of 220°C±5°C for a target time, and then cool the first carrier fixture, the second carrier fixture and the heat sink body to a melting point temperature;

[0030] Step S34: Cooling the first supporting fixture, the second supporting fixture and the heat sink body from the melting point temperature to 45-55° C.

[0031] On the other hand, in the step S31, the preheating temperature rise rate is ≤2°C / s, and the preheating time is 90~120s; in the step S32, the insulation time is 60~120s; in the step S33, for welding materials with a melting point temperature greater than 183°C, the target time is 45~90s, and for welding materials with a melting point temperature greater than 200°C, the target time is 10~20s; the step S34 also includes controlling the cooling rate of the first supporting fixture, the second supporting fixture and the radiator body to be 3~5°C / s.

[0032]

[0014] As a result, the heat dissipation in the heat of the equipment is gradually increased, and the amount of heat dissipation in the equipment is gradually increased. In addition, the heat dissipation in the equipment is gradually increased, and the amount of heat dissipation in the equipment is gradually increased. The radiator fins are arranged in parallel, and the arrangement direction of each radiator fin is consistent with the thickness direction of the radiator fin. The plane where the radiator fins are located is parallel to the airflow direction, that is, the airflow passes between two adjacent radiator fins; the side wall of the radiator fin refers to the surface on the radiator fin that has a heat dissipation effect; specifically, the porous noise reduction component can be fixed to the radiator fin by welding. In actual processing, in order to ensure the noise reduction effect of the porous noise reduction component and the heat dissipation effect of the radiator fin, the porous noise reduction component can be made of porous materials such as foam copper, foam aluminum or foam nickel. At the same time, the porous noise reduction component can be fixed to the radiator fin by welding methods such as soldering and vacuum brazing;

[0033] Furthermore, by adding the porous noise reduction component to the radiator fins of the radiator body and utilizing the porous noise reduction component to absorb aerodynamic noise, the purpose of reducing the aerodynamic noise in the air-cooled component is achieved. At the same time, by arranging the porous noise reduction component to extend along the airflow direction, the obstruction of the porous noise reduction component to the airflow can be minimized to the greatest extent under the premise of meeting the absorption requirements, thereby ensuring that the airflow can smoothly flow from the radiator body to the heat dissipation channel in the air-cooled equipment, thereby reducing the influence of the porous noise reduction component on the heat dissipation effect of the radiator; further, the radiator can also change the absorption effect of the porous noise reduction component on aerodynamic noise by changing the material, size or shape of the porous noise reduction component, thereby meeting the use requirements in different application scenarios and having a wide range of applications.

[0034] The radiator provided by the present invention, through the provision of the porous noise reduction component, utilizes porous dielectric materials to form a sound-absorbing and noise-reducing area on the surface of the radiator fins, thereby achieving the purpose of noise reduction. At the same time, by limiting the extension direction of the porous noise reduction component, the influence on the airflow in the heat dissipation channel can be reduced, thereby reducing the influence on the heat dissipation effect of the radiator body.

[0035] In one embodiment, a mounting groove is provided on the side wall of the fin of the radiator, the porous noise reduction component is fixed in the mounting groove, and an air gap is provided between the porous noise reduction component and the bottom of the mounting groove. The above arrangement can reduce noise by using the principle of standing wave resonance through the air gap, and the target frequency of noise reduction can be adjusted by adjusting the size of the air gap. The target frequency can be a different frequency value that the porous noise reduction component can reduce noise, thereby serving the purpose of supplementing and strengthening noise reduction. The noise reduction frequency band of the radiator can be adjusted by using the air gap to improve the noise reduction effect of the radiator.

[0036] The air-cooling device provided by the present invention is provided with the above-mentioned radiator. Since the radiator has the above-mentioned technical effects, the air-cooling device provided with the radiator should also have corresponding technical effects.

[0037] The radiator manufacturing method provided by the present invention adopts the radiator manufacturing tooling, arranges the porous noise reduction component and the welding material on the first bearing fixture and the second bearing fixture, uses the limiting groove on the bearing plate to limit the porous noise reduction component, and then uses the assembly between the first bearing fixture, the second bearing fixture and the radiator body to fix the relative position between the porous noise reduction component and the radiator fins of the radiator body; then, by heating the first bearing fixture, the second bearing fixture and the radiator body, the porous noise reduction component and the radiator fins are fixed by using the welding material to complete the welding process; because the bottom plate of the first bearing fixture is located at the first end of the radiator fin along the airflow direction, each bearing plate of the first bearing fixture is located at the radiator fin along the thickness direction. The radiator body is arranged on the first side of the heat sink, the bottom plate of the second supporting fixture is located at the second end of the radiator fin along the airflow direction, the supporting plates of the second supporting fixture are located at the second side of the radiator fin along the thickness direction, and the porous noise reduction component also extends along the airflow direction. Therefore, it is only necessary to move the first supporting fixture and the second supporting fixture along the airflow direction to separate the first supporting fixture, the second supporting fixture and the radiator body. Since the porous noise reduction component has been fixed on the radiator fin of the radiator body by the welding material, after separating the first supporting fixture and the second supporting fixture, the porous noise reduction component remains on the radiator fin. The radiator manufacturing method is easy to operate and convenient to disassemble and assemble. The limiting accuracy of the porous noise reduction component is high, which can effectively improve the manufacturing efficiency of the radiator and reduce the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a schematic structural diagram of a first specific implementation mode of the radiator provided by the present invention.

[0040] Figure 2 for Figure 1 Schematic diagram of the structure of the porous noise reduction component in the radiator shown.

[0041] Figure 3 This is a schematic structural diagram of a second specific implementation manner of the radiator provided by the present invention.

[0042] Figure 4 for Figure 3 A partial enlarged structural schematic diagram of the radiator is shown.

[0043] Figure 5 This is a schematic structural diagram of a third specific implementation manner of the radiator provided by the present invention.

[0044] Figure 6 This is a schematic structural diagram of a fourth specific implementation manner of the radiator provided by the present invention.

[0045] Figure 7 This is a left side view of the radiator provided by the present invention.

[0046] Figure 8 The left side view of the radiator provided by the present invention in another embodiment.

[0047] Fig. 9 The present invention provides a schematic structural diagram of a heat sink manufacturing tooling in the heat sink manufacturing method provided by the present invention.

[0048] Fig.10 for Fig. 9 The schematic diagram of the structure of the first load-bearing fixture in the heat sink manufacturing tooling is shown.

[0049] Fig.11 for Fig. 9 The figure shows the assembly structure diagram of the first load-bearing fixture and the radiator body in the radiator manufacturing tooling.

[0050] Fig.12 for Fig. 9 Schematic diagram of the assembly structure of the radiator manufacturing tooling shown.

[0051] Fig.13 The present invention is a flow chart of a method for manufacturing a heat sink.

[0052] Reference numerals:

[0053] 1- radiator body; 11- radiator body; 12- radiator fins; 121- mounting slot; 122- air gap; 123- noise reduction perforation; 2- porous noise reduction component; 3- radiator manufacturing tooling; 31- first bearing fixture; 311- limiting slot; 32- second bearing fixture; 33- first limiting fixture; 34- second limiting fixture. DETAILED DESCRIPTION

[0054] The core of the present invention is to provide a radiator, an air cooling device and a radiator manufacturing method, which can significantly improve the noise reduction ability of the radiator while ensuring the heat dissipation effect of the radiator.

[0055] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] In this implementation, please refer to Figure 1 , the heat sink includes:

[0057] The radiator body 1 comprises a radiator body 11 and a plurality of radiator fins 12 arranged on the radiator body 11, wherein the thickness direction of the radiator fins 12 is perpendicular to the air flow direction of the heat dissipation channel in the air-cooling device;

[0058] The porous noise reduction component 2 is used to absorb aerodynamic noise. The porous noise reduction component 2 is installed on the side wall of the radiator fin 12 along the thickness direction and extends along the airflow direction.

[0059] Specifically, the porous noise reduction component 2 can be fixed on the radiator fin 12 by welding. In actual processing, in order to ensure the noise reduction effect of the porous noise reduction component 2 and the heat dissipation effect of the radiator fin 12 at the same time, the porous noise reduction component 2 can be made of porous materials such as foam copper, foam aluminum or foam nickel. At the same time, soldering, vacuum brazing and other welding methods can be used to fix the porous noise reduction component 2 to the radiator fin 12 to ensure reliable connection and ensure heat transfer along the height direction of the radiator fin 12, thereby reducing the impact on the heat dissipation efficiency of the radiator; of course, the porous noise reduction component 2 can also be made of foam and other components, and any porous material that can absorb sound can be used. Of course, it is better to choose a porous noise reduction component 2 with excellent welding performance and good thermal conductivity; the porous noise reduction component 2 is made of porous material, mainly for medium and high frequency noise control, sound waves are transmitted to the surface of the porous material, part of the input sound waves produce internal friction with the material surface, and part of the sound energy is converted into heat energy, thereby reducing the sound energy.

[0060] The heat sink provided by the present invention has the following beneficial effects: the heat sink body 1 includes a heat sink body 11 and a plurality of heat sink fins 12 arranged on the heat sink body 11; the heat sink body 11 is used to absorb the heat of the device and transfer it to the heat sink fins 12; then the heat sink fins 12 transfer the heat of the device to the air through heat exchange with the air; in order to avoid the heat sink fins 12 blocking the airflow and ensure that the airflow can flow smoothly through the heat sink fins 12, the thickness direction of the heat sink fins 12 is generally arranged to be perpendicular to the airflow direction of the heat dissipation channel in the air-cooled device. That is, the airflow can flow through the two side walls of the radiator fins 12, so as to conveniently take away the heat on the radiator fins 12; the number of the radiator fins 12 is generally multiple, and each radiator fin 12 is located on the same side of the radiator body 11, and each radiator fin 12 is arranged in parallel, and the arrangement direction of each radiator fin 12 is consistent with the thickness direction of the radiator fin 12, and the plane where the radiator fin 12 is located is parallel to the airflow direction, that is, the airflow passes between two adjacent radiator fins 12; the side wall of the radiator fin 12 refers to the surface of the radiator fin 12 that has a heat dissipation effect;

[0061] Furthermore, by adding a porous noise reduction component 2 to the radiator fins 12 of the radiator body 1, the porous noise reduction component 2 is used to absorb aerodynamic noise, thereby achieving the purpose of reducing aerodynamic noise in the air-cooled components. At the same time, by arranging the porous noise reduction component 2 to extend along the airflow direction, it is possible to minimize the obstruction of the porous noise reduction component 2 to the airflow while meeting the absorption requirements, thereby ensuring that the airflow can smoothly flow from the radiator body 1 to the heat dissipation channel in the air-cooled equipment, thereby reducing the influence of the porous noise reduction component 2 on the heat dissipation effect of the radiator; further, the radiator can also change the absorption effect of the porous noise reduction component 2 on aerodynamic noise by changing the material, size or shape of the porous noise reduction component 2, thereby meeting the use requirements in different application scenarios and having a wide range of applications.

[0062] The radiator provided by the present invention, through the provision of a porous noise reduction component 2, utilizes a porous dielectric material to form a sound-absorbing and noise-reducing area on the surface of the radiator fin 12, thereby achieving the purpose of noise reduction. At the same time, by limiting the extension direction of the porous noise reduction component 2, the influence on the airflow in the heat dissipation channel can be reduced, thereby reducing the influence on the heat dissipation effect of the radiator body 1.

[0063] Furthermore, by setting a porous noise reduction component 2 on the radiator fin 12, or by setting a porous noise reduction component 2 on the radiator body 11, the porous noise reduction component 2 is selected from porous materials, such as porous metal materials, such as foam copper, foam aluminum and foam nickel, and the porous noise reduction component 2 can be combined with the radiator fin 12 by soldering or vacuum brazing, which plays a fixing role on the one hand, and ensures good thermal conductivity between the porous noise reduction component 2 and the radiator fin 12 on the other hand. At the same time, since the noise spectrum structure in air-cooled equipment such as servers is relatively complex, generally low-frequency, medium-frequency and high-frequency noises are simultaneously present, but porous materials have obvious sound absorption effects on high-frequency sounds, that is, the sound absorption coefficient is higher in the high-frequency region, while the sound absorption effect on low-frequency sounds is poor. Therefore, the preset noise absorption frequency can be adjusted by adjusting the density and external size parameters of the porous material. The regulation follows the following rules: 1. With the increase of the density of the porous material, that is, the decrease of the porosity ρ of the porous material, the maximum sound absorption coefficient α max Move to low frequency; 2. As the thickness d of the porous material increases, the maximum sound absorption coefficient α max Therefore, the preset noise absorption frequency of the entire radiator can be adjusted by adjusting the preparation process of the porous material, changing the porosity ρ of the porous material, or by changing the thickness d of the porous material on the surface of the radiator fin 12.

[0064] Specifically, taking the foam copper as an example, the preparation method of the porous noise reduction component 2 includes but is not limited to the following: 1. Thermosetting epoxy resin and ammonium bicarbonate method: This method adds thermosetting epoxy resin and ammonium bicarbonate to copper powder, and uses the thermal decomposition of ammonium bicarbonate and the thermal curing of thermosetting epoxy resin to foam and shape the mixed powder, thereby obtaining a foam copper with high porosity; 2. Polyurethane sponge infiltration method: This method uses polyurethane sponge as a substrate, and forms a foam blank by infiltrating copper powder, water, adhesive and other materials. The polyurethane sponge is decomposed by roasting, and copper is oxidized in the air to form a copper oxide foam. Finally, the metal oxide is decomposed and sintered under high vacuum to obtain a foam copper with high porosity; 3. CaCl2 as a pore-forming agent method: This method uses CaCl2 as a pore-forming agent to prepare a copper-based foam material by a sintering-dissolution method. By adjusting the process parameters and the amount of the pore-forming agent, the porosity and pore size can be controlled to obtain a foam copper material with different properties.

[0065] In some embodiments, Figure 2 As shown, the thickness d of the porous noise reduction component 2 along the thickness direction of the radiator fin 12 is 0.2λ 预设1 ~0.3λ 预设1 ,λ 预设1 is the wavelength at the first preset absorption noise frequency; as the thickness of the porous noise reduction component 2 increases, that is, the value of d increases, the preset absorption noise frequency moves toward the low frequency direction; conversely, as the thickness of the porous noise reduction component 2 decreases, that is, the value of d decreases, the preset absorption noise frequency moves toward the high frequency direction; specifically, the preset absorption noise frequency λ 预设1 The determination needs to be based on the frequency composition of the noise in the air-cooling equipment, and the preset noise absorption frequency that can contribute the most to noise reduction should be determined based on the data of the spectrum analysis; further, since the porous noise reduction component 2 has a significant sound absorption effect on high-frequency sounds, that is, the sound absorption coefficient is greater in the high-frequency region, the thickness of the porous noise reduction component 2 should not be too large. Specifically, the first preset noise absorption frequency can be selected as needed and determined as the first optimal noise absorption frequency.

[0066] In some embodiments, please refer to Figures 3 to 5 , a mounting groove 121 is provided on the side wall of the fin 12 of the radiator, the porous noise reduction component 2 is fixed in the mounting groove 121, and an air gap 122 is provided between the porous noise reduction component 2 and the bottom of the mounting groove 121. The above arrangement can reduce noise by using the principle of standing wave resonance through the air gap 122, and the target frequency of noise reduction can be adjusted by adjusting the size of the air gap 122, which can be a different frequency value that the porous noise reduction component 2 can reduce noise, thereby serving as a supplement and strengthening purpose of noise reduction, and the noise reduction frequency band of the radiator can be adjusted by using the air gap 122, so as to improve the noise reduction effect of the radiator.

[0067] In some embodiments, the surface of the porous noise reduction component 2 facing away from the heat sink fin 12 is flush with the notch surface of the mounting groove 121, such as Figure 3 As shown, such a configuration can reduce the influence of the porous noise reduction component 2 on the radiator fins 12, and increase the noise reduction effect of the radiator fins 12 while retaining the original structure of the radiator fins 12.

[0068] In some embodiments, one side surface of the heat sink fin 12 protrudes from the notch surface of the mounting slot 121, such as Figure 5 As shown, such a configuration can, on the one hand, enhance the noise reduction effect of the porous noise reduction component 2 with the help of the structure of the air gap 122, and on the other hand, can also increase the heat dissipation area of ​​the radiator fin 12 and improve the flow state of the boundary layer on the surface of the radiator fin 12 to achieve the purpose of enhancing heat dissipation.

[0069] In some embodiments, Figure 4 As shown, the thickness d of the air gap 122 along the thickness direction of the heat sink fin 12 is 间隙 0.15λ 预设2 ~0.35λ 预设2 ,λ 预设2 is the wavelength at the second preset noise absorption frequency. Similarly, the second preset noise absorption frequency can be selected as needed and determined as the second optimal noise absorption frequency. Specifically, the air gap 122 is used as a measure to enhance the noise reduction effect. Therefore, the second preset noise absorption frequency of the noise reduction can be other frequency values. As a supplement and enhancement, it can also be the same noise absorption frequency as the first preset noise absorption frequency. Since its noise reduction principle is different from that of the porous noise reduction component 2, the air gap 122 mainly uses the principle of standing wave resonance. Therefore, when determining the gap thickness, it is necessary to avoid d 间隙 0.5λ 预设2 .

[0070] In some embodiments, the porous noise reduction component 2 is strip-shaped, and the cross section may be square. There are multiple porous noise reduction components 2, which are arranged at intervals from one side of the radiator fin 12 close to the radiator body 1 to the other side, and each porous noise reduction component 2 is arranged in parallel; specifically, Figure 7 As shown, the strip-shaped porous noise reduction component 2 is convenient for welding, easy to process, and has low manufacturing cost.

[0071] In some embodiments, porous noise reduction components 2 are provided on both side walls of the radiator fin 12 along the thickness direction, and the porous noise reduction components 2 located on the two side walls of the radiator fin 12 are staggered. Specifically, the mounting grooves 121 on the two side walls of the radiator fin 12 along the thickness direction are staggered. Such a setting can reduce the influence of the setting of the mounting grooves 121 on the strength of the radiator fin 12, and at the same time form a staggered structure in the extension direction of the radiator fin 12, which is conducive to noise reduction at different heights of the radiator fin 12.

[0072] In some embodiments, a side surface of the porous noise reduction component 2 facing away from the radiator fin 12 protrudes beyond the side wall surface of the porous noise reduction component 2 to increase the effective heat dissipation area of ​​the radiator fin 12, thereby improving the heat dissipation efficiency.

[0073] In some embodiments, Figure 6 As shown, a tip or a serration is provided on the side of the porous noise reduction component 2 away from the radiator fin 12, the tip extends in the direction away from the radiator fin 12, and the serration extends on the porous noise reduction component 2 from one side close to the radiator body 1 to the other side; the provision of the tip or the serration is helpful to improve the flow state of the boundary layer on the surface of the radiator fin 12, and further achieve the effect of enhancing the heat dissipation; that is, by changing the structure of the side of the porous noise reduction component 2 away from the radiator fin 12, not only can the noise be reduced, but also the boundary layer on the surface of the radiator fin 12 can be destroyed, so as to enhance the convective heat exchange and improve the heat dissipation capacity.

[0074] In some embodiments, Figure 7 and Figure 8 As shown, a plurality of noise reduction perforations 123 are provided on the side wall of the radiator fin 12, and the noise reduction perforations 123 are arranged at intervals, and the noise reduction perforations 123 are arranged through the thickness direction of the radiator fin 12. Specifically, by opening holes in the radiator fin 12 of the radiator body 1 and controlling the size of the perforation rate, the noise absorption effect can be changed. The smaller the perforation rate, the better the low-frequency noise absorption effect, and the higher the perforation rate, the better the sound absorption of medium and high-frequency noise; the perforation diameter of the noise reduction perforation 123 is less than 3 mm, and the noise reduction perforation 123 is arranged in a microporous array, and the perforation area is as shown in FIG. Figure 7 Of course, the cross section of the noise reduction perforation 123 may also be an ellipse, such as Figure 8 As shown, it may also be a rectangle, a hexagon or a triangle, as long as the noise reduction effect can be achieved.

[0075] In some embodiments, the sum of the cross-sectional areas of the noise reduction perforations 123 located on the same side wall of the radiator fin 12 is 1% to 3% of the surface area of ​​the side wall on the radiator fin 12; specifically, the perforation rate refers to the ratio of the cross-sectional area of ​​the noise reduction perforations 123 to the unperforated area. The higher the perforation rate, the better the absorption effect of medium and high frequency sounds, and the smaller the perforation rate, the better the absorption effect of low frequency sounds. The specific arrangement position and method of the noise reduction perforations 123 can be set as needed.

[0076] In some embodiments, the cross-section of the noise reduction perforation 123 is circular or waist-shaped, the noise reduction perforation 123 has a plurality of rows, and the number of noise reduction perforations 123 in each row is multiple, the arrangement direction of each row of noise reduction perforations 123 is parallel to the extension direction of the porous noise reduction component 2, and each row of noise reduction perforations 123 and the porous noise reduction component 2 are alternately arranged on the radiator fin 12 from one side close to the radiator body 1 to the other side; Figure 7 and Figure 8 As shown, the uniformity of the noise reduction effect can be ensured by alternating the porous noise reduction components 2 and the noise reduction perforations 123. Of course, two rows of noise reduction perforations 123 can be arranged between two adjacent porous noise reduction components 2, or two porous noise reduction components 2 can be arranged between two adjacent rows of noise reduction perforations 123. Any method that can facilitate processing is acceptable.

[0077] The radiator uses a metal porous medium material as a porous noise reduction component 2, and designs a sound absorption and noise reduction area on the surface of the radiator to achieve the purpose of noise reduction. In addition, by designing a porous noise reduction component 2 on the surface of the radiator fin 12, the heat dissipation area is increased, and at the same time, the flow state of the boundary layer on the surface of the radiator fin 12 can be improved to achieve the purpose of enhanced heat dissipation; in addition, since the noise components in the air-cooled equipment are complex, including noise components in low, medium and high frequency bands, in the present technical solution, the noise reduction frequency band of the radiator can be adjusted by using air gaps 122 and noise reduction perforations 123, so as to improve the noise reduction effect of the radiator.

[0078] In addition to the above-mentioned radiator, the present invention also provides an air-cooling device, including the above-mentioned radiator, and the air-cooling device can be an electronic device such as a server and a host computer.

[0079] In addition to the above radiator, the present invention also provides a method for manufacturing the radiator.

[0080] The heat sink manufacturing method can manufacture the above heat sink, and the heat sink manufacturing tool 3 can be used. Please refer to Figures 9 to 12The radiator manufacturing tooling 3 includes a first bearing fixture 31 and a second bearing fixture 32. The first bearing fixture 31 and the second bearing fixture 32 both include a bottom plate and a plurality of bearing plates. The bearing plates are provided with a limiting groove 311 for placing the porous noise reduction component 2; specifically, the first bearing fixture 31 and the second bearing fixture 32 can both be U-shaped, and the openings of the first bearing fixture 31 and the second bearing fixture 32 are arranged relatively to each other, which can facilitate the disassembly and assembly of the first bearing fixture 31 and the second bearing fixture 32 on the radiator body 1; the bearing plates are arranged at intervals on the bottom plate, and the spacing distance of the bearing plates should be consistent with the spacing distance of the radiator fins 12, so that each bearing plate can correspond one-to-one to the radiator fins 12.

[0081] For details, please refer to Fig.13 , the heat sink manufacturing method comprises:

[0082] Step S1: placing the porous noise reduction component 2 and the welding material on the first loading fixture 31 and the second loading fixture 32;

[0083] Step S2: Assemble the first carrying fixture 31, the second carrying fixture 32 and the radiator body 1, and make the bottom plate of the first carrying fixture 31 located at the first end of the radiator fin 12 along the airflow direction, each carrying plate of the first carrying fixture 31 located at the first side of the radiator fin 12 along the thickness direction, the bottom plate of the second carrying fixture 32 located at the second end of the radiator fin 12 along the airflow direction, and each carrying plate of the second carrying fixture 32 located at the second side of the radiator fin 12 along the thickness direction;

[0084] Step S3: heating the first carrying fixture 31, the second carrying fixture 32 and the radiator body 1 until the welding material is melted, the welding material fixes the porous noise reduction component 2 on the radiator body 1, and then cooling the first carrying fixture 31, the second carrying fixture 32 and the radiator body 1;

[0085] Step S4: Separate the first supporting fixture 31 , the second supporting fixture 32 and the heat sink body 1 along the airflow direction to obtain a heat sink with a porous noise reduction component 2 .

[0086] The radiator manufacturing method adopts a radiator manufacturing tool 3, by arranging the porous noise reduction component 2 and the welding material on the first bearing fixture 31 and the second bearing fixture 32, using the limiting groove 311 on the bearing plate to limit the porous noise reduction component 2, and then using the assembly between the first bearing fixture 31, the second bearing fixture 32 and the radiator body 1, the relative position between the porous noise reduction component 2 and the radiator fins 12 of the radiator body 1 can be fixed; then, by heating the first bearing fixture 31, the second bearing fixture 32 and the radiator body 1, the porous noise reduction component 2 and the radiator fins 12 are fixed by the welding material to complete the welding process; since the bottom plate of the first bearing fixture 31 is located at the first end of the radiator fins 12 along the airflow direction, each bearing plate of the first bearing fixture 31 is located at the radiator fins 12 along the thickness direction On the first side, the bottom plate of the second supporting fixture 32 is located at the second end of the radiator fin 12 along the airflow direction, and each supporting plate of the second supporting fixture 32 is located at the second side of the radiator fin 12 along the thickness direction, and the porous noise reduction component 2 also extends along the airflow direction. Therefore, it is only necessary to move the first supporting fixture 31 and the second supporting fixture 32 along the airflow direction to separate the first supporting fixture 31, the second supporting fixture 32 and the radiator body 1. Since the porous noise reduction component 2 has been fixed on the radiator fin 12 of the radiator body 11 by welding material, after separating the first supporting fixture 31 and the second supporting fixture 32, the porous noise reduction component 2 remains on the radiator fin 12; the radiator manufacturing method is easy to operate and convenient to disassemble and assemble, and has high limiting accuracy for the porous noise reduction component 2, which can effectively improve the manufacturing efficiency of the radiator and reduce the manufacturing cost.

[0087] In some embodiments, the radiator manufacturing tool 3 also includes a limiting clamp, which is U-shaped, with an opening of the limiting clamp facing the radiator body 11, and a groove width of the limiting clamp equal to the width of the radiator fin 12 plus twice the width of the bearing plate. The limiting clamp can limit the relative positions of the radiator fin 12, the first bearing clamp 31, and the second bearing clamp 32 to prevent the first bearing clamp 31 and the second bearing clamp 32 from moving along the thickness direction of the radiator fin 12, thereby ensuring that the porous noise reduction component 2 can be smoothly welded and fixed on the radiator fin 12; specifically, the limiting clamp includes a first limiting clamp 33 and a second The limiting clamp 34, the first limiting clamp 33 and the second limiting clamp 34 are respectively installed on two radiator fins 12 located far away from each other on the radiator body 11 to improve stability and facilitate the subsequent welding process; the installation of the first limiting clamp 33 and the second limiting clamp 34 should be carried out in step S1; further, in step S4, before separating the first supporting clamp 31 and the second supporting clamp 32, first remove the first limiting clamp 33 and the second limiting clamp 34 in the direction away from the radiator body 11, and then remove the first supporting clamp 31 and the second supporting clamp 32. The operation is convenient and the processing accuracy is high.

[0088] In a specific embodiment, the radiator manufacturing tooling 3 includes a first bearing fixture 31, a second bearing fixture 32, a first limiting fixture 33, a second limiting fixture 34, a porous noise reduction component 2 and a radiator body 1, wherein the first bearing fixture 31 and the second bearing fixture 32 are completely identical in structure. Such a design improves the reuse rate of the fixture and facilitates later replacement and maintenance. The first bearing fixture 31 and the second bearing fixture 32 are provided with limiting grooves 311 for placing solder and porous noise reduction materials. The first limiting fixture 33 and the second limiting fixture 34 are also completely identical in structure. They can play a limiting role in the first bearing fixture 31, the second bearing fixture 32 and the radiator body 1, ensuring that the welding material, the porous noise reduction component 2 and the radiator body 1 are reliably fixed during the welding process, and no relative displacement occurs, thereby ensuring that the welding interface is well bonded; the shape and structural parameters of the limiting groove 311 can be adjusted according to the shape of the designed porous noise reduction component 2.

[0089] Specifically, the radiator manufacturing tool 3 is suitable for soldering and vacuum brazing; taking soldering as an example, first clean the first supporting fixture 31, the second supporting fixture 32 and the surface of the radiator fin 12 to ensure that there are no stains affecting welding; put the porous noise reduction component 2 and the solder paste in the limiting groove 311 of the first supporting fixture 31 and the second supporting fixture 32 in turn and evenly, and ensure that the solder paste is evenly applied when applying, and there should be no missing or thickening; assemble the radiator body 1 with each fixture to ensure reliable fixation; put the clamped radiator body 1 and the radiator manufacturing tool 3 into the reflow oven for heating to ensure the uniformity of the heating temperature; cool the radiator and the radiator manufacturing tool 3 assembled on the radiator as a whole, and ensure that the welding material is solidified; after cooling, remove the radiator manufacturing tool 3 and check the welding quality; adopt the vacuum brazing method, the process can refer to soldering, only change the welding equipment, that is, the vacuum brazing furnace, and the welding process parameters.

[0090] In some embodiments, step S3 further includes:

[0091] Step S31: preheating the first carrying fixture 31, the second carrying fixture 32 and the heat sink body 1;

[0092] Step S32: When the preheating temperature reaches the melting point of the soldering material, the first supporting fixture 31, the second supporting fixture 32 and the heat sink body 1 are kept warm;

[0093] Step S33: Continue heating the first carrier fixture 31, the second carrier fixture 32 and the heat sink body 1 to a peak temperature of 220°C±5°C for a target time, and then cool the first carrier fixture 31, the second carrier fixture 32 and the heat sink body 1 to a melting point temperature;

[0094] Step S34: Cooling the first supporting fixture 31, the second supporting fixture 32 and the heat sink body 1 from the melting point temperature to 45-55°C.

[0095] In some embodiments, in step S31, in order to ensure temperature uniformity, the preheating speed should not be too fast, and the preheating temperature rise rate is ≤2°C / s. By reducing the preheating temperature rise rate, the heating temperature rise rate of the first supporting fixture 31, the second supporting fixture 32 and the radiator body 1 is guaranteed, thereby ensuring temperature uniformity and ensuring the stability of the welding effect; further, according to the melting point of the selected welding material, the preheating time is 90~120s. For example, for welding materials with higher melting points, the preheating time can be appropriately increased, and for welding materials with lower melting points, the preheating time can be appropriately reduced to ensure that the welding material can be stably heated; in step S32, the insulation time is 60~120s, so as to remove the oxide on the welding surface, thereby improving the porous noise reduction component 2 and the radiator fin 12 The connection stability between them; in step S33, for the welding material with a melting point temperature greater than 183°C, the target time is 45~90s, that is, the welding material with a melting point temperature greater than 183°C, after being heated to the peak temperature, is kept warm for 45~90s to ensure that the welding material can be fully melted, and for the welding material with a melting point temperature greater than 200°C, the target time is 10~20s, that is, the welding material with a melting point temperature greater than 200°C, after being heated to the peak temperature, is kept warm for 10~20s to ensure that the welding material can be fully melted, so that the welding is completed between the contact surface of the porous noise reduction component 2 and the radiator fin 12; step S34 also includes controlling the cooling rate of the first supporting fixture 31, the second supporting fixture 32 and the radiator body 1 to be 3~5°C / s to ensure the smooth formation of the alloy solder joint.

[0096] Specifically, in a specific embodiment, step S3 includes:

[0097] Step S31: preheating the first load fixture 31, the second load fixture 32 and the heat sink body 1, with a preheating rate of ≤2°C / s and a preheating time of 90-120s;

[0098] Step S32: when the preheating temperature reaches the melting point of the soldering material, the first carrier fixture 31, the second carrier fixture 32 and the heat sink body 1 are kept warm for 60 to 120 seconds;

[0099] Step S33: Continue heating the first carrier fixture 31, the second carrier fixture 32 and the heat sink body 1 to a peak temperature of 220°C±5°C for a target time, and then cool the first carrier fixture 31, the second carrier fixture 32 and the heat sink body 1 to a melting point temperature;

[0100] Among them, for welding materials with melting point temperature greater than 183°C, the target time is 45~90s, and for welding materials with melting point temperature greater than 200°C, the target time is 10~20s;

[0101] Step S34: Cooling the first supporting fixture 31, the second supporting fixture 32 and the heat sink body 1 from the melting point temperature to 45-55°C, and controlling the cooling speed to 3-5°C / s.

[0102] Furthermore, after obtaining the radiator, the welding quality is mainly checked by visual inspection and X-ray inspection to see if there are defects inside the welding. The main welding defects to avoid are:

[0103] Cold solder joint: Cold solder joint refers to the failure of solder to effectively adhere to the surface of the solder joint, resulting in insufficient soldering strength; Detection and solution: Use visual inspection and X-ray inspection technology to ensure soldering quality; Before soldering, perform surface treatment on the object to be soldered to remove the oxide layer.

[0104] Empty solder joint: Empty solder joint refers to the phenomenon that there is no solder attached to the solder joint; Solution: a. Optimize the solder paste printing process to ensure that the solder paste covers the soldering area; b. Ensure the cleanliness before soldering to avoid oxidation or contamination affecting the soldering quality; c. Adjust the temperature setting of the reflow oven to ensure that the solder is fully melted and covers the solder joint.

[0105] The radiator, air cooling equipment and radiator manufacturing method provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the radiator manufacturing method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A radiator, characterized in that: include: A radiator body (1) comprises a radiator body (11) and a plurality of radiator fins (12) arranged on the radiator body (11), wherein the thickness direction of the radiator fins (12) is perpendicular to the airflow direction of the heat dissipation channel in the air-cooling device; A porous noise reduction component (2) is used to absorb aerodynamic noise; the porous noise reduction component (2) is mounted on a side wall of the radiator fin (12) along a thickness direction and extends along the airflow direction.

2. The heat sink according to claim 1, characterized in that: The thickness d of the porous noise reduction component (2) along the thickness direction of the radiator fin (12) is 0.2λ 预设1 ~0.3λ 预设1 ,λ 预设1 The wavelength at the first preset absorption noise frequency.

3. The heat sink according to claim 1, characterized in that: A mounting groove (121) is provided on the side wall of the radiator fin (12), the porous noise reduction component (2) is fixedly arranged in the mounting groove (121), and an air gap (122) is provided between the porous noise reduction component (2) and the bottom of the mounting groove (121).

4. The heat sink according to claim 3, characterized in that: A side surface of the porous noise reduction component (2) facing away from the radiator fin (12) is flush with a notch surface of the mounting groove (121), or a side surface of the radiator fin (12) protrudes from the notch surface of the mounting groove (121).

5. The heat sink according to claim 3, characterized in that: The thickness d of the air gap (122) along the thickness direction of the heat sink fin (12) is 间隙 0.15λ 预设2 ~0.35λ 预设2 ,λ 预设2 is the wavelength at the second preset absorption noise frequency.

6. The heat sink according to claim 1, characterized in that The porous noise reduction component (2) is strip-shaped, and there are a plurality of the porous noise reduction components (2), which are arranged at intervals from one side of the radiator fin (12) close to the radiator body (1) to the other side, and the porous noise reduction components (2) are arranged in parallel.

7. The heat sink according to claim 1, characterized in that: A side surface of the porous noise reduction component (2) facing away from the radiator fin (12) protrudes beyond a side wall surface of the porous noise reduction component (2) to increase an effective heat dissipation area of ​​the radiator fin (12).

8. The heat sink according to claim 7, characterized in that: The porous noise reduction component (2) is provided with a tip or a serration on a side facing away from the radiator fin (12), the tip extending in a direction facing away from the radiator fin (12), and the serration extending on the porous noise reduction component (2) from one side close to the radiator body (1) to the other side.

9. The radiator according to any one of claims 1 to 8, characterized in that: A plurality of noise reduction perforations (123) are provided on the side wall of the radiator fin (12), the noise reduction perforations (123) are arranged at intervals, and the noise reduction perforations (123) are arranged to penetrate along the thickness direction of the radiator fin (12).

10. The heat sink according to claim 9, characterized in that The sum of the cross-sectional areas of the noise reduction perforations (123) located on the same side wall of the radiator fin (12) is 1% to 3% of the surface area of ​​the side wall of the radiator fin (12).

11. The heat sink according to claim 9, characterized in that The cross-section of the noise reduction perforations (123) is circular or waist-shaped, the noise reduction perforations (123) are arranged in a plurality of rows, and the number of the noise reduction perforations (123) in each row is multiple, the arrangement direction of the noise reduction perforations (123) in each row is parallel to the extension direction of the porous noise reduction component (2), and the noise reduction perforations (123) in each row and the porous noise reduction component (2) are arranged alternately on the radiator fin (12) from one side close to the radiator body (1) to the other side.

12. An air cooling device, comprising a radiator, characterized in that: The radiator is the radiator according to any one of claims 1 to 11.

13. A method for manufacturing a heat sink, used for manufacturing the heat sink according to any one of claims 1 to 11; characterized in that: A heat sink manufacturing tool (3) is used, the heat sink manufacturing tool (3) comprising a first bearing fixture (31) and a second bearing fixture (32), the first bearing fixture (31) and the second bearing fixture (32) both comprising a bottom plate and a plurality of bearing plates, the bearing plates being provided with a limiting groove (311) for placing the porous noise reduction component (2); the heat sink manufacturing method comprises: Step S1: arranging the porous noise reduction component (2) and the welding material on the first carrying fixture (31) and the second carrying fixture (32); Step S2: Assembling the first supporting fixture (31), the second supporting fixture (32) and the radiator body (1), and making the bottom plate of the first supporting fixture (31) located at the first end of the radiator fin (12) along the airflow direction, the supporting plates of the first supporting fixture (31) located at the first side of the radiator fin (12) along the thickness direction, the bottom plate of the second supporting fixture (32) located at the second end of the radiator fin (12) along the airflow direction, and the supporting plates of the second supporting fixture (32) located at the second side of the radiator fin (12) along the thickness direction; Step S3: heating the first bearing fixture (31), the second bearing fixture (32) and the heat sink body (1) until the welding material is melted, the welding material fixes the porous noise reduction component (2) on the heat sink body (1), and cooling the first bearing fixture (31), the second bearing fixture (32) and the heat sink body (1); Step S4: separating the first supporting fixture (31), the second supporting fixture (32) and the heat sink body (1) along the airflow direction to obtain a heat sink having the porous noise reduction component (2).

14. The heat sink manufacturing method according to claim 13, characterized in that: The step S3 further comprises: Step S31: preheating the first carrying fixture (31), the second carrying fixture (32) and the heat sink body (1); Step S32: when the preheating temperature reaches the melting point of the welding material, the first supporting fixture (31), the second supporting fixture (32) and the heat sink body (1) are kept warm; Step S33: continuing to heat the first load-bearing fixture (31), the second load-bearing fixture (32) and the heat sink body (1) to a peak temperature of 220°C±5°C and continuing for a target time, and then cooling the temperatures of the first load-bearing fixture (31), the second load-bearing fixture (32) and the heat sink body (1) to a melting point temperature; Step S34: Cooling the first supporting fixture (31), the second supporting fixture (32) and the heat sink body (1) from the melting point temperature to 45-55°C.

15. The heat sink manufacturing method according to claim 14, characterized in that: In the step S31, the preheating temperature rise rate is ≤2°C / s, and the preheating time is 90-120s; in the step S32, the heat preservation time is 60-120s; in the step S33, for welding materials with a melting point temperature greater than 183°C, the target time is 45-90s, and for welding materials with a melting point temperature greater than 200°C, the target time is 10-20s; the step S34 also includes controlling the cooling speed of the first supporting fixture (31), the second supporting fixture (32) and the heat sink body (1) to be 3-5°C / s.

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